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Ubuntu 12.04 LTS: USN-2541-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey March 24, 2015
Dist Ubuntu Esm H88
Important Ubuntu notice USN-2542-2 highlights several vulnerabilities in the kernel that pose risks to system reliability and security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

The Linux kernel's splice system call did not correctly validate its

parameters. A local, unprivileged user could exploit this flaw to cause a

denial of service (system crash). (CVE-2014-7822)

A flaw was discovered in how Thread Local Storage (TLS) is handled by the

task switching function in the Linux kernel for x86_64 based machines. A

local user could exploit this flaw to bypass the Address Space Layout

Radomization (ASLR) protection mechanism. (CVE-2014-9419)

Dmitry Chernenkov discovered a buffer overflow in eCryptfs' encrypted file

name decoding. A local unprivileged user could exploit this flaw to cause a

denial of service (system crash) or potentially gain administrative

privileges. (CVE-2014-9683)

Sun Baoliang discovered a use after free flaw in the Linux kernel's SCTP

(Stream Control Transmission Protocol) subsystem during INIT collisions. A

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel patch Ubuntu kernel system crash

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
  linux-image-3.2.0-79-generic    3.2.0-79.115
  linux-image-3.2.0-79-generic-pae  3.2.0-79.115
  linux-image-3.2.0-79-highbank   3.2.0-79.115
  linux-image-3.2.0-79-omap       3.2.0-79.115
  linux-image-3.2.0-79-powerpc-smp  3.2.0-79.115
  linux-image-3.2.0-79-powerpc64-smp  3.2.0-79.115
  linux-image-3.2.0-79-virtual    3.2.0-79.115

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-2541-1

CVE-2014-7822, CVE-2014-9419, CVE-2014-9683, CVE-2015-1421

Severity
critical
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Low
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Critical

March 24, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical kernel patch Ubuntu kernel system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-79.115

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